Finding the Fourth Proportional to 1,340.78, 1,850.30 and 874.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.78 : 1,850.30 = 874.76 : x
2. Step 2: Convert to fraction form
   1,340.78/1,850.30 = 874.76/x
3. Step 3: Cross multiply
   1,340.78x = 1,850.30 × 874.76
4. Step 4: Simplify right side
   1,340.78x = 1,618,568.43
5. Step 5: Solve for x
   x = 1,618,568.43/1,340.78
6. Step 6: Final answer
   x = 1,207.18